Unset XCODE_DEVELOPER_DIR_PATH when building mac binding projects, so that
when building from VSfM when the Xcode in VSfM differs from the system Xcode
(according to xcode-select) the Xcode command-line tools don't end up confused
and fail in strange ways.
* [mmp] Fix symbol name for 32-bit Objective-C classes. Fixes#58861.
https://bugzilla.xamarin.com/show_bug.cgi?id=58861
* [tests] Add test case for bug #58861.
https://bugzilla.xamarin.com/show_bug.cgi?id=58861
* [tests] Fix build failure for msbuild and xammac tests.
Fixes this:
> tests/common/mac/ProjectTestHelpers.cs(93,68): error CS0117: 'Driver' does not contain a definition for 'Verbosity'
* [mmptest] Fix build to build MobileBinding.dll as well.
This makes sure tests that need MobileBinding.dll actually have it.